Loom-cam.



M. R. CASEY. LOOM CAM. APPLICATION FILED JAN-28.1916.

m. 35;, jmww Patented Dec. 19,1916.

UNITED STA ES PATENT OFFICE.

MARION R. CASEY, OF CLINTON, SOUTH CAROLINA, ASSIGNOR TO CLINTON CAM COM- PAN'Y, OF CLINTON, SOUTH CAROLINA, A CORPORATION OF SOUTH CAROLINA.

LOOM-CAM.

Specification of Letters Patent.

Application filed January 28, 1918. Serial No. 74,793.

To all whom it may concern Be it known that I, MARION R. CASEY, a citizen of the United States of America, and a resident of Clinton county of Laurens, State of South Carolina, have invented certain new and useful Improvements in Loom-Cams, of which the following is a full and clear specification.

This. invention relates to that well known type of cloth weaving loom in which a rotating cam-shaft is employed for alternately operating the picker-staffs which throw the shuttle back and forth, one of these came being located at each end of the cam-shaft in such manner as to cooperate with the picle ball or roller of the pick-arm to actuate the picker-stud.

The object of this invention is to so construct this cam that it not only increases the life of the cam, but also cushions or dissipates the resulting from the blow of the picker ball against the cam periphery, thereby contributing materially to smoothness of running of the loom and the consequent rednction in wear of parts of the loom, as more .fully hereinafter set forth.

In the drawings, Figure 1 is a side elevation of a cam constructed in accordance with myinvention; Fig. :2 is a sectional view on the line 2-2 of Fig, 1; Fig. 3 is a side elevation of a cam shaft of a loom provided with a pair of cams constructed in accordance with my invention,the usual pick arms of the loom being shown in dotted lines.

My invention consists in overweighting, that is, laterally enlarging the cam body at a too or point just to the rear of the cam point a, this enlargement being designated in the drawing by the letter Z. This enlargement extends from a point just back of the toe of the cam for a considerable distance around the periphery, and is preferably disposed on one face of the cam. This enlargelnent may be cast integral with the cam, as shown, or it may be made in a separate casting and bolted to the face of the cam, as shown in my co-pending application Serial No. 53,613, filed October 1, 1915. The periphery of the enlargement coincides with the periphery of the main. part of the cam, thereby increasing the width of the periphery at the point where the enlargement is dis osed. 0

s is well known, the pick ball strikes the cam with considerable of a blow at a point back of ";the toe of the cam. This ball, be-

ing in the form of a roller, extends entire across the periphery of the main partof the cam as well as that of the enlargement, so that the enlargement of the, cam at this point "greatly increases the bearing surface and Patented Dec. 19, 1916.

use of my invention in a loom materially increases the eiliciency and the life of the gears that operate the cam shaft and also prevents slipping of the driving belt, thus increasing the life of the belt and insuring a maximum product in each days run.

As is well known these cams are arranged on the shaft in such manner that they operate the picker staffs alternately, that is,

the points of greatest diameter of the cams are arranged at diametrically opposite sides of the shaft. When my cams are used, it will be seen that the weighted portlons'of the cam will thus be disposed at diametrically opposite points so as to thereby tend to balance the running of the shaft. This balancing of the cam shaft will also tend to contribute to the smooth running of the loom.

It will be understood, of course, that the enlargement may extend nearer to the toe portion than I have illustrated and, in fact,

may extend entirely to the point of ti; toe member. In cams of this type, the toe a is usually made removable for renewal pur poses, and in case a removable too is used with my invention, it will be seen that a part of the weight may be embodied in the too. It will also be understood that where the weight is made detachable as in my co-pend-- ing application hereinbefore referred to, the too may be cast integral With the removable part or patch, so as to be separable from the' cam with the patch or enlargement.

Havin thus described my invention, what I c aim is:

1. A loom cam of the class set forth, overweighted at a point back of the toe portion of the cam, for the purpose set forth.

-2. A loom cam of the type set forth hav ing a weight disposed on it at a point'ju'st back of the toe portion of the cam, this weight projecting laterally from the oath and having a perilphery coincident with the periphery of the ody of the cam, so as to thereby increase the bearing surface of the pick ball.

3. A loom cam of the class set forth, overweighted at a ,point back of the toe portion of the com, said weight being cast integral with the cam.

4. A loom (mm of the class set forth, overweighted at a point back of the toe portion of the cam, said weight being cast integral with the cam and having its outer face 00- incident, with the periphery of the cam, 80 as to thereby provide an extended wearing surface for the pick ball.

In testimony whereof I hereunto aflix my signature.

MARION R. CASEY. 

